Electronic Principles – Section 2

46. Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount  of resistance?

A. P = I2R
B. P = IE
C. P = E2/R
D. I = P/E
E. None of the above

Correct Answer:  C. P = E2/R

47. The equivalent of 1 megohm is:

A. 1 k ohm
B. 100,000 ohm
C. one-millionth of an ohm
D. one million ohms
E. None of the above

Correct Answer:  D. one million ohms

48. Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?

A. E = PR
B. E = I2R
C. I = E/R
D. I = ER
E. None of the above

Correct Answer:  C. I = E/R

49. Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff?

A. 20 k Ohm or more
B. 200 k Ohm or less
C. 200 k Ohm or more
D. 20 km or less
E. None of the above

Correct Answer:  B. 200 k Ohm or less

50. If the current gain is 200 and the collector current is 100 mA, the base current is

A. 2 mA
B. 0.5 mA
C. 2 A
D. 200 A
E. None of the above

Correct Answer:  B. 0.5 mA

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